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The first two calls were relatively calm. On September 11, a staff member called 911 to report an 81-year-old patient with a "respiratory problem." The dispatcher told her help is on the way.

The next day, a staff member called to report a 93-year-old man with a fever who's not alert and having difficulty breathing. That dispatcher also said help is on the way.

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But on September 13, three days into Irma's aftermath, the 911 calls grew increasingly frantic.

'She's in cardiac arrest!'

The first call of the day came in at 3 a.m.

"There's a patient who's in cardiac arrest," a woman said. "We don't have any air condition(ing), so I saw her slouch over. I realized that she's not breathing, so I checked her. She's just barely breathing ... and her fingers started to change color -- slightly blue."

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As the dispatcher asked questionsfrom a required check list, the caller seemedto get increasingly agitated.

"Is she in severe pain?" the dispatcher asked

"No! She's in cardiac arrest!" the caller replied.

"I understand that, ma'am. But we have to ask these questions," the dispatcher said. "Help is on the way as requested. We'll be sending an emergency response. If she gets worse in any way, please call us back immediately."

'What a night'

About an hour later, a staff nurse called 911 to report a patient with "very labored" breathing. The nurse said the patient was not completely alert.

It's just after 4 a.m. But already, the nurse exclaimed, "what a night."

The dispatcher said help is on the way.

At 5:36 a.m., 911 dispatchers received the third call of the day from the nursing home.

"I'm calling because a patient is in cardiac arrest," the caller said. "The nurse is in the room now ... they're doing CPR now."

'Oh my God, this is crazy'

Over the next hour, staff members called 911 three more times for three different patients.

'The call...was very daunting'

"We just got a request from Larkin Community Hospital Behavioral Health Services in Hollywood. They're saying that they have -- they're having issues with patients, and there may be casualties," the caller said. "They're requesting ambulance assistance."

Larkin's Behavioral Health Services is adjoined to The Rehabilitation Center at Hollywood Hills nursing home. According to a Larkin hospital statement, "Our 152 bed Skilled Nursing Facility, The Rehabilitation Center at Hollywood Hills offers a comprehensive line of rehabilitation services."

The caller from the county emergency operations center stressed that he was relaying second-hand information.

"Again, I'm not 100% sure of the situation," he said. "We want to be on the safe side here. I know you guys are really busy. But the call that came in was very daunting. And we got a call from them yesterday that we routed, and it looks like nothing -- or it looks like they need more assistance."

Criminal investigation underway

Authorities have not released the exact causes of death for the 14 nursing home patients who died. Hollywood police said the deaths are part of an ongoing criminal investigation.